Subject is always empty when I do click on an email in Android

I'm developing an App and I added a simple TextView with autoLink="email"

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginBottom="10dp"
    android:textSize="16dp"
    android:autoLink="email"
    android:text="@string/lblContactUs" />

My string looks like this:

<string name="lblContactUs">Federico Navarrete <a href="mailto:fanm_45@outlook.com?Subject=Contact%20Us%TipSal" target="_top">fanm_45@outlook.com</a></string>

Always, when I do click in the link the subject is empty.

Also, I noticed that if I don't have a real email inside of the tag:

<a href="mailto:fanm_45@outlook.com?Subject=Contact%20Us%TipSal">fanm_45@outlook.com</a>

However, I have something like this:

<a href="mailto:fanm_45@outlook.com?Subject=Contact%20Us%TipSal">Contact us</a>

The link doesn't do anything, the code is fully ignored. Does anyone have any idea what should I change? Or why is not working?

PS: I already tested on Gmail and Blue Mail clients, I got the same result.

I think textview can not identify this <a href="mailto:"/>. But textView can identify mail address.

You can change your string.xml to

<string name="lblContactUs">fanm_45@outlook.com</string>

The behavior should be the same with

<string name="lblContactUs"><a href="mailto:">fanm_45@outlook.com</a></string>

To achieve your requirement you should use the customer span for mail sending.

1. Set your text can be clicked by usiing ClickableSpan

class MyURLSpan : ClickableSpan
{
    MainActivity mActivity;

    public MyURLSpan(MainActivity activity)
    {
        mActivity = activity;
    }
    public override void OnClick(View widget)
    {
        Intent email = new Intent(Intent.ActionSend);
        email.SetType("text/plain"); 
        //real device please use  email.SetType("message/rfc822");
        email.PutExtra(Intent.ExtraEmail, "mikexxma@outlook.com");  
        email.PutExtra(Intent.ExtraSubject, "hello");    
        email.PutExtra(Intent.ExtraText, "hello mike ma");
        mActivity.StartActivity(email);
    }
}

2. Add the click listener to the text:

private SpannableString getClickableSpan()
{
    string s = "contact me";
    SpannableString sp = new SpannableString(s);
    sp.SetSpan(new MyURLSpan(this), 0, s.Length, SpanTypes.InclusiveInclusive);
    return sp;
}

3. Set the span to the textview :

protected override void OnCreate(Bundle bundle)
{
    base.OnCreate(bundle);

    // Set our view from the "main" layout resource
     SetContentView (Resource.Layout.Main);
    mailTV = (TextView)FindViewById(Resource.Id.textView2);
    mailTV.SetText(getClickableSpan(), TextView.BufferType.Spannable);         
    mailTV.MovementMethod = LinkMovementMethod.Instance;
}

You can find :